In this task, you will be presented with a context from an academic paper and a question separated with a 
. You have to answer the question based on the context.

Combining the modulus part and the phase part, HAKE maps entities into the polar coordinate system, where the radial coordinate and the angular coordinates correspond to the modulus part and the phase part, respectively. 
 Question: How are entities mapped onto polar coordinate system?
radial coordinate and the angular coordinates correspond to the modulus part and the phase part, respectively